Kreplach are dumplings that are commonly served during Purim. They are typically filled with a mixture of ground meat, onions, and spices, and then boiled or fried. Kreplach can be served in soup or as a main dish. The dough is made with flour, eggs, and water, and is rolled out thin. The filling is then placed in the center of each dough circle, and the edges are sealed together to form a dumpling. The dumplings are then cooked until tender and served hot.